Debt and Short-Term Borrowings - Total Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 471,805	$ 496,734
Note Payable due on January 1, 2022 \| Notes Payable
Debt Instrument [Line Items]
Note payable due January 1, 2022	721	1,443
Term A due on November 27,2023 \| Credit Facility
Debt Instrument [Line Items]
Credit facility	$ 176,161	$ 188,788
Fixed rate	1.75%	1.75%
Term B due on November 27, 2024 \| Credit Facility
Debt Instrument [Line Items]
Credit facility	$ 294,923	$ 306,503
Term B due on November 27, 2024 \| Credit Facility \| LIBOR
Debt Instrument [Line Items]
Minimum variable rate	0.00%	3.50%

Debt Instrument, Interest Rate, Variable Rate Floor

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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